Enhancement of coherent emission by energy-phase correlation in a bunched electron beam

被引：29

作者：

Doria, A ^{[1
]}

Gallerano, GP ^{[1
]}

Giovenale, E ^{[1
]}

Letardi, S ^{[1
]}

Messina, G ^{[1
]}

Ronsivalle, C ^{[1
]}

机构：

[1] ENEA, Ente Nuove Tecnol Energia & Ambiente, Dipartimento Innovaz, Div Fis Appl, I-00044 Frascati, Italy

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.80.2841

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A radio-frequency (rf) modulated electron beam passing through a magnetic undulator emits coherent radiation at harmonics of the rf with a phase which depends an the electron drift velocity. Treating the bunches as ensembles of electrons, each with its energy and phase, the radiated field is calculated as a sum over the particle distribution in the phase space. At long wavelengths a proper correlation between the energy and phase distributions of the electrons in the bunch can be exploited to lock the radiated field in phase, resulting in a significant enhancement of the coherent emission.

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页码：2841 / 2844

页数：4

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